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Modelling elongational and shear rheology of two LDPE melts
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SYSNO ASEP 0328827 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Modelling elongational and shear rheology of two LDPE melts Title Modelování elongační a smykové viskozity dvou LDPE tavenin Author(s) Rolón-Garrido, V. H. (DE)
Pivokonský, Radek (UH-J) SAI, ORCID, RID
Filip, Petr (UH-J) ORCID, RID, SAI
Zatloukal, M. (CZ)
Wagner, M. H. (DE)Source Title Rheologica Acta - ISSN 0035-4511
Roč. 48, č. 6 (2009), s. 691-697Number of pages 7 s. Publication form on-line - on-line Language eng - English Country DE - Germany Keywords Rheology ; MSF model ; Shear flow ; Elongational flow ; Strain hardening ; Low-density polyethylene ; Polymer melts Subject RIV BK - Fluid Dynamics R&D Projects IAA200600703 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20600510 - UH-J (2005-2011) UT WOS 000267058300008 DOI 10.1007/s00397-009-0366-8 Annotation Experimental data of two low-density polyethylene (LDPE) melts at 200◦C for both shear flow (transient and steady shear viscosity as well as transient and steady first normal stress coefficient) and elongational flow (transient and steady-state elongational viscosity) as published by Pivokonsky et al. (J Non- Newtonian Fluid Mech 135:58–67, 2006) were analysed using the molecular stress function model for broadly distributed, randomly branched molecular structures. For quantitative modelling of melt rheology in both types of flow and in a very wide range of deformation rates, only three nonlinear viscoelastic material parameters are needed: Whilst the rotational parameter, a2, and the structural parameter, β, are found to be equal for the two melts considered, the melts differ in the parameter f 2 max describing maximum stretch of the polymer chains. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2010
Number of the records: 1